Pneumatic scissors.



L. STEPHANY.

PNEUMATIC SGISSORS. APPLICATION 11.21; mm. '26. 1908.

Patented Feb. 15, 1910.

II l

une ntcz "Un s" STATES LUDWIG STEPHANY, F PHILADELPHIA, PENNSYIiVANIA, AS SIGNOR OF ONE-HALF TO DANIEL STAHL. I

PNEUMATIC SCISSORS.

Specification of Letters Patent.

Patented Feb. 15, 1910.

Application filed December 2'6, 1908. Serial no. 469,260. 7

To all whom it may concern:

Be it known that I, LUDWIG STEPHANY, a citizen of the United States, residing in the city 'andcounty of Philadelphia, State construction of a pneumatic scissors by the employment of which the cutting or severmg of any desired fabric can be readily and quickly accomplished.

It further consists of a DOVQlCOIlStIllCtlOII of pneumatic scissors wherein I employ a turbine wheel with buckets, said turbinewheels being operatively connected with the movable blade of the scissors.

It further consists of a novel manner of assembling the movable blade with the connecting rod whereby the movable blade may .be quickly disconnected when it is desired toremove the same for grinding or inspection.

It further consists of a novel construction of a stationary blade and novel means for1 securing the same 'to the casing of the too.

It, further consists of novelmeans for assembling the parts of the casing.

It further consists of other novel features more fully described.

For the purpose of illustratingmy invention I have, shown in the accompanying drawings preferred embodiments thereof .of construction all as will be hereinafter which have given in practice satisfactory and reliable results, although it is to be understood that the instrumentalities of which my invention consists can be variously arranged and. organized and that my invention is not limited to the exact .arrange-' ment and organization of such instrumentalities as herein shown and described.

Figure 1 represents a sideelevation of a pneumatlc scissors embodying my invention, one portion of the casing having been removed-and a portion of the device being i 7 shown in section. Fig. 2 represents a sectional vieW, of. Fig. 1. Fig. ,3 represents .a section on line M Fig. 2. Fig. 4 represents a perspective view of the stationary blade in detached position. Fig. 5 represome a perspective view showing more clearly the .manner in which the movable blade isremovably'secured to the means for bonsists of a novel operating the same. 'Fig. 6 represents a section on y-y of Fig. 1. Fig. 7 represents a side elevation partly in section of another embodiment of-my invention. Fig. 8 represents a side elevation of a portion of a pneumatic scissors showing another embodi ment of my invention.

Similar numerals of reference indicate corresponding parts in the figures.

Referring to the drawings. Referring first to Figs. 1 to 6 inclusive, 1 designates a pneumatic scissors embodying my invention, the same consisting of a casing member 2 to which a cover 3 is removably secured and in order to reduce the number of fastening devices to a minimum the casing 2 is apertured as indicated at 4 and the cover 3 is provided with a hook 5 which is adapted to engage the aperture 3:.to'lock the parts in assembled position, 'eing seen that by such a construction is simply necessaryto employ a single ning device which engages the apertur'e-"ti "and fastening devices engaging the apertures 7 to secure the parts of the casing in assembled position.

-8 designates a conduit which is threaded or otherwise adapted to be connected with the motive liquid supply, said conduit being secured to the casing member..2 inany suitable manner.

9 designates a stator which extends through the conduit 8 and at its inner end is provided with a flaring outlet the purpose of which will hereinafter appear.

10 designates a wall in the stator 9. 11 and 12 designate ports whlch extend through the conduit 8 and the stator 9, said ports being adapted to communicate at certain times with a groove '13 in the valve sleeve 14 which latter is provided with a stop member 15 which limits the rotation of the valve sleeve 14 by its-abutting against the cover 31.

16 designates a turbine shaft which is mounted in the casing member 2 in any suitable manner and to which is secured a tur-- bine wheel 17 provided with buckets 18 which travel in proximity to the flaring outlet of the-stator 9, whereby the motive fluid passing from the stator 9, impinges against the buckets 18 and causes the rotation of the turbine wheel 17 as will be apparent to those skilled in this art.

19 designates an eccentric which is secured ".1"

iii any suitable manner to the turbine wheel 17, said eccentric having mounted thereon a connecting rod which is provided with an adjusting device 21 such as a turn buckle or its equivalent, whereby the length of the connecting arm may be varied as desired. The connecting arm20- has pivoted-at its able blade 25 may be quickly removed without the use of any tools. The blade 25 is provided preferably with an inclined cutting ace 29.

In practice I preferably construct the easing of aluminum or other light metal and in. order that the fastening devices for securing the stationary blade 30 to the casing member 2 will not be liable to become disengaged therefrom, I provide plates 31 \of metal which are secured to the casing member 2 in' any desired manner, preferably by dovetailing the same to the casing member 2 as seen in Fig. 6.

The stationary blade 30 is provided with a cuttin face 32 the lower portion of which is roun ed as indicated at 33. The blade 30 is also provided with a slot 34 which at its inner end has an enlarged diameter as indicated at 35.

37 "designates apertures through the blade 30, it being noted that a pottlon of-the lower wall .of such apertures are retained as indicated at 38.

-38 designates fastening devices such as screws,-it being noted, as most clearly seen in Figs. 1 and 6, that one face of the head of the .screw has been cut away so thatwhen the blade 30;has,been placed in position on the nose of the casingmember 2 that the fastening device 39 on being assembled in position and given a half turn will cause the head thereof to engage against the wall 38 and maintain the stationary blade 30 in assembled position with respect to the easing member 2. a

40 designates a guide block which is fastened to the casing member 2 by means of suitable fastening devices as the screws 41,

it being understood that since the stationary blade 30' is provided with a slot 34 through which the ide member 40 passes, the stationary blfllil 30 may be removed from the casing member 2 .without disturbing the ide member 40.

42 designates a plate to which a fastening device 43 is secured which latter engages cutting face 29 Will-coact i the guide block 40 and also if, desired, the

casing member 2, whereby when the parts are assembled the movable blade 25 is main- I tained in proper position with respect to the stationary blade 30.

44 designates. a spring which is secured to the casing member 2 in any suitable manner, the free end of said spring engaging the movable blade,25 as seen in Fig. 2, thereby maintaining the two blades in operative relation at all times and areventing any excessive friction of the blade 25 against the plate 42.

The operation of this embodiment of my.

invention will now b readily understood and is as follows: Having the parts in the position indicated in F i 1 it will be apparent that when the va ve sleeve-14 is rotated to the position seen in Fig. 2, the motive fluid may pass through the conduit 8 to port 11, groove '14 in the valve sleeve 14.

"and port 12, through the flaring mouth of the stator 9 and impinging a ainst the buckets 18 of the turbine wheel 1 will cause said turbine wheel to be rotated. together with its eccentric .19 thereby causing the reciprocation of the connect-ing rod 20 which as has before been explained is operatively connected with the movable blade 25 whereby the with the cutting face 32 of the blade 30 and the severingor cutting of the fabric or other article will be effected in a very eflicient mannerand withgreat rapidity, it being apparent that the speed with'which the turbine wheel 17 is rotated Will vary in accordance with the pressure of the motive fluid employed to actuate the .tool. The exhanstfluid escapes tothe atmosphere through ports 45 in the casing, the number of-such orts as will be apparent, "arying in accor ance with the size of such orts and their location.

In the em odiment seen. in Fig. 7, I have shown a modified form' of my invention wherein the movable blade has an oscillating instead of a reciprocating motion. I11 thls embodiment .the motive fluid passes through the inlet 46, and when the valve 47 is actuated, which latter may be of any usual or conventional type, the motive fluid may pass. from theostator 48 to the buckets of the turbine .,wheel 49 thereb. causing the rotation of such turbine'wheel it being seen that this wheel is mounted on a shaft 50 jo'urnaled iii brackets 51 carried by the easing of the device. The wheel 49 is provided with an eccentric 52 on which is mounted the connecting rod 53 s that on, the rotation llO of the turbine wheel the armr 53 yzill be reing its reciprocation and since the slotted end 56 of. the movable blade 57 is pivoted at 58 to the stationary blade 59 and is piveaaoesl oted at 69 to the arm 53 the-blade 57 will be oscillated as desired. In the embodiment seen in Fig. 8 the motive fluid passes from the stator 60 and impinges against the buckets of the turbine wheel 61, thereby causing said turbine wheel to be rotated on its shaft- 62, thereby causing rotation of the eccentric 63 secured to said turbine wheel and the reciprocation of the connecting arm 64 mounted on said eccentric, it being seen that the connecting arm 64 is provided with a turn buckle 65 whereby the length of such arm may be adjusted.

The connecting rod 64 has its free end pivotally connected with the movable blade 66 which latter is pivoted at 67 to the stationaryblade 68.

It will be noted that in the embodiment seen in Figs. 7 and 8' the movable blade has an oscillating motion instead of av reciproeating mot-ion and while in Fig.i7 I have shown the movable blade as being provided with a slot 56 through which the screw 69 passes which engages the connecting rod 53 and have shown the connecting rod 53 as guided in its movement by the screw which passes through the'slot 54, it will be apparent that in Fig. 8 I have shown the connecting rod 64 as being directly connected with the movable blade '66.

I wish to call particular attention to certain novel features in the construction of my device whereby I am enabled to quickly take apart or assemble the cutting blades for the purpose of cleaning or grinding.

It will be sen that when the blade 42 secured to the fastening device 43 is turned the movable blade 25 may be turned on its pivot as indicated in Fig.5 and when such blade 25 is partially rotated the slot 28 will register with the bar 24 so that such in the art that I have designed a novel and blade may be readily removed .from the block 22 without necessitating the employment of any tools. I

When it is desired to remove the stationary blade the fastening devices 39 are rotated a half turn so that the head thereof beinclusive, I have shown all of the working parts as being carried by the casing member 2 so that when the cover 3 is removed all of the parts are readily accessible for the purpose of oiling, inspection or repairs. I

When the cutting faces ofithe blade bocome-worn the blades may be readily *adjusted with respect to each other by actuating the turnbuckle 21 as is hereinbefore de scribed. Y a

It will now be apparent to those skilled useful -const-ruction,of a pneumatic scissors which embodies the features of advantage enumerated as desirable in the foregoing description, and while I have, in thepresent instance, shown and described preferred embodiments thereof which have been found in 'practice to givesatisfactory and reliable results, it is to be understood that the same are susceptible of modification in various particulars without departing from the spirit or scope of the invention or sacrificing any of its advantages.

- Having thus described my invention, what I claim as new and desireto secure by Letters Patent'is J 1. In a pneumatic scissors, a casing, a stationary blade having a slot and apertures therethrough, a fastening device adapted to interlock with said apertures and engagin I said 'caslng, a guide member seated in sat slot and secured to said casing, a movable blade mounted on said guide and coacting with said stationary blade, a transverse bar secured to said guide block for maintaining said blade in operative relation, a block with which said movable blade is adapted to in-' terlock, an adjustable connecting rod se-,

cured to said block, a turbine wheel mounted in said casing and to which said connecting rod is eccentrically connected, and means for conducting motive fluid to said wheel.

2. In a pneumatic scissors, a-sectional cas-. ing in one section of which all of the moving parts are mounted, a turbine wheel rotatably mounted on said casing,an eccentric connected with said wheel, a connecting arm mounted on said eccentric, means for adjusting the length of said arm, a movable blade, with which said connecting arm is adapted to be interlocked, a stationary blade coacting with said movable blade and removably carried by said casin and means for controlling the admission vo motive fluid to said turbine wheel.

- 3. In a pneumatic scissors, a casing hav-. 7

ing a stationary blade removably secured thereto, the lower portion of the cutting face of said blade belng rounded, a movable blade having an inclined cutting face adapted to coact' with said stationary blade, a turbine wheel with buckets rotatably mounted in said casing, an eccentric operatively connected with said wheel, an adjustable connecting'rod mounted on said eccentric and operatively connected with said movable blade, and means for controlling the admission of motive fliiid to said buckets.

4. In a pneumatic scissors, a sectional casing having an aperture in one section thereof, the other of said sections having a hook adapted to interlock with said aperture, a turbine wheel with buckets rotatably mounted in said apertu'red section, an eccentric operatively connected with said wheel, a connecting arm operatively connected tion during their movement, and means for l controlling the admission of motive fluid to said buckets.

5. Ina pneumatic scissors, a casing, metal plates secured thereto, fastening devices engaging said metal pieces, a statlon'ary blade having a slot and provided with apertures with which said fastening devices are adapted to interlock, a guide block seated in said slot, a movable blade mounted on said guide block, a connecting rod with which said blade is adapted to be interlocked, means for maintaining said blades in operative relation, a turbine wheel to which said connecting rod is eccentricall secured, and means for controllin the a mission of motivefluid to said tur. ine wheel.

6. In a portable scissors, a casing, a stationary blade. having a slot therein and provided with apertures, fastening devices adapted to interlock-with said apertures and engaging said casing, a uide block seated in said slot, a movable b ade having a slot and mounted on said guide block, a block having a lug ada ted to interlock with said blade and to be partial rotation of said blade, and a fluid actuated motor operatively connected withsaid last named block for controlling theemo'ved therefrom on the movement .of said movable blade.

' 7. In a portable scissors, a casing, a stationary blade removably secured thereto, a

ide'block carried by said casing and passing through said blade, a movable blade having, a slot and a communicating aperthe lengt ofing beyond the sides of said aperture to lock said block and blade in assembled position,

\ and a fluid actuated motor connected with said block for actuating said blade.

8. In a pneumatic scissors, a casin a movable member mounted therein, uid actuated means for controlling the movement of said member, a connecting rod actuated by said member, means for varying the length of said connecting rod, a block to which'said rod is pivoted, a movable blade removably carried by said block and having an inclined cutting face, a stationary blade removably' carried by said'casing and having a' cutting face coa'cting with the cutting face of said movable blade, and means for preventing said blades.

9 In a pneumatic scissors, a casing, a stator carried thereby, a rotor mounted within said casing in proximity to the stator, means for conducting motive fluid to the stator, a guide block carried by the casing, a fixed blade adapted to interlock therewith, a movable blade mounted on said guide block, means for maintaining said blades in operative relation to each other, an adjustable crank connection connected with the rotor, a block pivotally connected with the crank connection, and atransverse bar adapted to interlock with said movable blade whereby the latter may be moved therefrom without the use of tools.

LUDWIG STEPHANY. Witnesses:

DANIEL STAHL,

H. S. FAIRBANKS.-

improper relative movement of r 

